Boxes or cartons



July 17, 1956 D. I EvKoFF BOXES 0R cARToNs Filed March 5, 1954 I INVENTOR rDaB/(ul [em/faz?" @QJw ATTORNEY United States Patent() Y 1 2,755,012' BOXES R CARTONS David Levkolf, Great Neck, N. Y., assigner of one-fourth to Evelyn S. Levkof, one-fourth to Henry S. Levkoif, l:iludYone-fourth to Edith L. Sexmct, all of Great Neck,

Application March 5, 1954, Serial No. 414,438

4 Claims. (Cl. 229-14) This invention relates to boxes or cartons, and more particularly to the relatively shallow tray-like cartons used for containing food products such as fruits, vegetables, baked products, candies and many other articles.

When cartons of this character are used for containing certain types of food products, such as baked goods for example, the fats, oils or greasy materials contained in the goods often penetrate the cardboard body of which the ycarton is formed, resulting in unsightly greasy spots or. areas on the exterior of the carton and materially detracting from its appearance. ln an effort to prevent this, various coatings have been applied to the box body and in some instances the material is laminated or provided on its inner surface With a lining composed of grease-resistant paper or parchment. The application of the lining or parchment paper to the cardboard, is usually done while the board and lining paper are in the sheet and before the box blanks are stamped out. One of the objections to this procedure is that when the heavy cylinders of the cutting and creasing machine contact with the laminated sheet and die cut and score the same, the surface of the parchment liner is often broken to such an extent as to allow the grease to penetrate and reach the outer cardboard and spread over the same in one or more unsightly areas.

It is therefore one of the objects of the present invention to provide a laminated box or carton body of such construction that the lining material or grease-resistant parchment paper will be applied over the inner surface of the blank after the blank had been cut out and scored, so that the operation of the cutting and scoring machinery, having been effected prior to the affixment of the lining material, cannot affect the lining material which will have its surface unbroken and undisturbed.

It is `another object of the invention to provide a lining material of grease-resistant nature affixed to the body of The box blank in a manner that when the box is erected, the entire interior of the box will be lined with the grease-resistant paper and thus the grease, oil or fatty materials in the goods contained in the box will be prevented from penetrating the lining material and reaching the outer cardboard.

It is another object of the invention to provide a laminated box with a lining material so arranged that when the box is erected certain portions of the lining material will extend over and cover slits in the bottom of the box to thereby prevent the possibility of the grease reaching the outer cardboard body through such slits.

With these and other objects to be hereinafter set forth in view, I have devised the arrangement of parts to be described and more particularly pointed out in the claims appended hereto.

In the accompanying drawing forming a part hereof and in which Ian illustrative embodiment of the invention is disclosed,

Fig. 1 is a top plan View of the blank from which the improved box or carton is constructed, the outer face of the blank being uppermost;

Fig. 2 is a sectional View, taken substantially on the line 2 2 of Fig. l, looking in the direction of the arrows;

Fig. 3 is a face View of a portion of the folded and glued box;

Fig. 4 is`an end View of the box, with the locking flap in' an erect or upstanding position;

.Y 2,755,012 Patented July 17, 1956 Fig. 5 is a transverse sectional view across the erected box, with the locking flap in an erect position;

Fig. 6 is a transverse sectional view in perspective of the fully erected box, and

Fig. 7 is a sectional View, taken substantially on the line 7-7 of Fig. 5, looking in the direction of the arrows.

Referring to the drawing, and more particularly to Fig. l thereof, the box blank is generally indicated at 1, and includes a bottom Z and side walls 3 and 4, the latter being, in the erected position of the box, folded upwardly on the parallel score lines indicated respectively at 5 and 6. The end walls of the box or carton are designated respectively at 7 and 8 and are folded to upstanding position o-n the transverse score lines 9 and 10. Substantially on the score lines 9 and 10 are provided slits 11 which are thus located at the junctions of the bottom and end walls. Between the ends of the side walls 3 and 4 and the end walls 7 and 8 are webs 12, and each of these webs is notched inwardly from its outer edge as indicated at 13. From the apex 14 of each of the notches 13 to the junction of the score lines 5 and 6 with the score lines 9 and 10, extend diagonal score lines 15, which score lines are partly slit as indicated at 16. Extending beyond the webs 12 are the flaps 17 which, when adhesively secured together in overlapped relation as shown in Figs. 3 and 5, form the inner layer of the locking flap of the carton. One ap of each pair of these flaps is adhesively coated as shown at 1S and by means of which the flaps in each pair are held together in overlapped, adhesively-united relation.

Each of the ilaps 17 is formed with a tongue 19, and these tongues overlap and co-operate in forming a tongue on each of the inner layers of the locking ilap for entry into the slits 11 when the locking ilaps are turned down into the box in the manner shown in Fig. 6.

It will be noted that the box blank is composed of two layers or plies indicated respectively at 20 and 21. The ply or layer indicated at 20 is the relatively heavy body layer of cardboard and constitutes the outer layer of the carton. The layer shown at 21 is a relatively thin layer of grease-resistant paper such as glassine, waxed paper, parchment or any other suitable sheet material relatively impervious to grease, oil or fatty ingredients likely to be contained in the goods to be packed in the carton. In the application of the thin lining material or sheet 21 to the outer material 20, it is desirable that this be done after the blank 1 is cut out and scored. When the lining material is applied in this manner, or after the blank 1 has been formed, folding, scoring or other operations will not be applied to the lining material and when the blank is completed and has had the lining material adhesively applied to it, the surface of the lining material so applied will be smooth, ilat and unbroken. Moreover, when the lining material 21 is applied to the blank after the blank has been cut out and scored, a considerable saving of lining material occurs, since the lining material is applied to only the cut-out blank, and not to the entire sheet from which the blank is cut, which latter procedure results in waste of those portions of the lining material that would be adherent to the parts of the sheet that are located between the cut-out blanks and usually constitute waste.

It will be further noted that the sheet of lining material 21 applied to the blank 1 is substantially rectangular; that its straight side edges 22 and 23 clear the parts of the flaps 17 that are overlapped and adhesively united. It will be further noted that the space between the pairs of aps 17 is bridged by the panel 24 of the lining material 21, and which panels 24 of lining material are eventually disposed on the interior of the box and form coverings for the end walls thereof, as clearly noted `in Fig. 6. The panels 24 are made'of sutiicient size so that each of the ice same provide a projecting end portion 25 extending beyond the limits of the aps 17 for a purpose to be presently explained. lt is to be further observed that the notches 13 are covered on the interior of the box by the parts 26 of the lining material which extend over these notches.

From the foregoing, the construction and operation of the box or carton will be readily understood. I n its initial form, the blank appears as shown in Fig. l, wherein the blank is shown with its cardboard face outermost. The blank is folded upon the score lines 5 and 6 to thereby bring the parts of the flaps 17 into overlapping relation, which parts are adhesively secured together' in such relation by means of the glue spots 18. The blank now appears in the form shown in Fig. 3, and the blanks are shipped to the user in this folded, flattened condition. To erect the box or carton merely requires the folding of the same upon the transverse fold lines 9 and 10 and which operation can be done either manually or by machine and when this is done, the webs will fold on the diagonal fold lines 15, which folding is aided materially by the notches 13 and slits 16. When this erection of the end walls takes place, the carton is then in the position shown in Figs. 4 and 5. It will be there noted that the upwardly extended portion of each end wall, arising above the top of the carton, consists of a pair of the overlapped and adhesively-united flaps 17 and an outer ply of the lining material 21, provided by a panel 24. Now the upstanding parts of the end walls above the top edge of the box constituting the locking flap and outer covering 24 therefor, are folded down upon the score lines 27 and this brings the locking flaps down into the box. The tongues 19 on these flaps are entered into the slits 11 and the end wall structure of the carton is thereupon complete and held rigidly. It will be noted that when the locking tlaps are turned down into the box in the manner just described, the panels 24 of the lining material are dispose-d on the inside of the box, since the side walls 3 and 4 and bottom 2 are also lined with the material 21, and the entire interior surface of the box in its erected position, is covered and protected with this grease-resistant lining material.

When the locking ilaps are turned down into the box as just mentioned, and the tongues 19 are inserted in the slits 11, the protruding or extended parts 25 of the lining material at the ends of the locking aps ex slightly at the bottom of the box and these ends become protective elements which cover the slits 11 and prevent the seepage of grease out through these slits. Thus, when the box is erected as above explained, the entire interior of the same is protected by the lining material, and the exterior of the box will thus present a neat, unsoiled, spotless condition under all uses.

Having described a single embodiment of the invention, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claims.

What I claim is:

l. A box or carton having a body provided with a bottom, side walls and end walls, notched webs located between the side and end walls and diagonally folded when the walls are erected into vertical position, the box being composed of an outer cardboard layer and an inner lining, flaps formed as extensions of the webs and disposed and adhesively united in overlapped position to form a locking Hap, a tongue on one end of the locking ap, a slit in the bottom adjacent to an end wall, said locking flap being downturned and having its tongue entered into the slit, the lining material having a portion located disposed over the back of the locking flap and presented on the exposed surface of the locking ap on the inside of the carton when the locking flap is downturned into the carton, said portion of the lining material being provided with a part extending over and covering the slit to prevent leakage therethrough.

2. A box or carton having a body composed of two laminations intimately and facially secured together, one of the laminations forming a relatively stiff body and being composed of cardboard, and the second lamination being composed of a thin grease-resistant paper and forming a lining for the outer lamination, the body having side walls, end walls and a bottom, said walls and bottom having their inner faces covered with the lining paper, locking ilaps on the end walls, said locking tlaps having the lining paper exposed on their outer faces when the locking ilaps are in an upstanding position, said lining paper being exposed outermost on the inside of the carton when the locking flaps are downturned into the carton, the lining paper having parts projecting beyond the tongued ends of the locking aps, which parts t over and cover the junctions between the end walls and bottom of the carton when the locking flaps are downturned into the carton.

3. A box or carton having a body formed with a bottorn, side walls and end walls, diagonally-foldable webs at the ends of the side walls the body of the carton being composed of two layers of sheet material, one of said layers constituting the outer layer and being composed of cardboard and the second layer constituting a lining material and being of a thinner, grease-proof paper, the body having ap elements connected at the ends of the webs and disposed in overlapping position to form locking aps that are turned down into the body of the box, said aps each having a tongue at its outer end, the body having slits in its bottom for the reception of the tongues when the locking flaps are downturned into the body of the box, the lining material being of greater length than the entire length of the body of the box whereby parts of said lining material extend beyond the tongued ends of the locking flaps, the lining material having panels disposed behind the locking flaps and exposed outwardly on the inside of the box when the locking aps are downturned into the box, and the end portions of thc lining material adjacent to the tongued ends of the locking aps being flexed to extend over and cover the slits when the locking flaps have their tongued ends inserted in said slits, to thereby prevent leakage through said slits.

4. A box or carton having a body formed with a bottom, side walls and end walls, foldable webs at the ends of the side walls the body of the carton being composed of two layers of sheet material, one of said layers constituting the outer layer and being composed of cardboard and the second layer constituting a lining material and being of a thinner, grease-proof paper, the body having ap elements connected to the webs and secured in overlapping position to form locking aps that are turned down into the body of the box, said tlaps each having a tongue at its outer end, the body having slits in its bottom adjacent to the bases of the end walls for the reception of the tongues when the locking aps are downturned into the body of the box, the lining material being of greater overall length than the entire length of the body of the box whereby parts of said lining material will extend beyond the tongued ends of the locking ilaps, the lining material including panels disposed behind the locking flaps when said aps are in unfolded position and exposed outwardly on the inside of the box when the locking aps are downturned into the box, and the end portions of the lining material adjacent to the tongued ends of the locking aps being exed to extend over and cover the slits when the locking flaps have their tongues inserted in said slits.

References Cited in the ile of this patent UNITED STATES PATENTS 2,503,798 Buttery Apr. 11, 1950 2,532,808 Grinnell Dec. 5, 1950 2,568,170 Ringler Sept. 18, 1951 2,619,275 Bergstein Nov. 25. 1952 

